Originally written on Fox Olympics  |  Last updated 8/27/14

BERLIN - AUGUST 22: Usain Bolt of Jamaica celebrates winning the gold medal in the men's 4x100 Metres Relay Final during day eight of the 12th IAAF World Athletics Championships at the Olympic Stadium on August 22, 2009 in Berlin, Germany. (Photo by Andy Lyons/Getty Images)
Usain Bolt fessed up. It was his back. The Olympic champion said Thursday a bad back has been causing him hamstring problems, leading to a pair of losses to training partner Yohan Blake at the Jamaican trials. ''It was a slight problem. I got that fixed and I'm ready to go,'' Bolt said in his first formal media appearance of the London Games, where he was given the honor of carrying his country's flag at Friday's opening ceremony. Bolt lost to Blake twice at the recent Jamaican trials in both the 100 and his favored 200 meters. The setbacks fueled speculation that he was injured but haven't dampened expectation that he will retain his 100 and 200 gold medals. ''My fitness (at the trials) was all right, I guess, but I wasn't at the best,'' Bolt said. ''I can't complain. It was all right. It's always a wake up call to get beaten. For me it's all about getting it right on the day. I'm all right (now).'' Bolt also dismissed talk that he had been training away from TV cameras and re...
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